<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<link rel="STYLESHEET" href="lib.css" type='text/css' />
<link rel="SHORTCUT ICON" href="../icons/pyfav.png" type="image/png" />
<link rel='start' href='../index.html' title='Python documentation Index' />
<link rel="first" href="lib.html" title='Python library Reference' />
<link rel='contents' href='contents.html' title="Contents" />
<link rel='index' href='genindex.html' title='Index' />
<link rel='last' href='about.html' title='About this document...' />
<link rel='help' href='about.html' title='About this document...' />
<link rel="next" href="stream-recoder-objects.html" />
<link rel="prev" href="stream-reader-objects.html" />
<link rel="parent" href="codec-base-classes.html" />
<link rel="next" href="stream-recoder-objects.html" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name='aesop' content='information' />
<title>4.8.1.6 StreamReaderWriter Objects </title>
</head>
<body>
<div class="navigation">
<div id='top-navigation-panel' xml:id='top-navigation-panel'>
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td class='online-navigation'><a rel="prev" title="4.8.1.5 streamreader Objects"
  href="stream-reader-objects.html"><img src='../icons/previous.png'
  border='0' height='32'  alt='Previous Page' width='32' /></a></td>
<td class='online-navigation'><a rel="parent" title="4.8.1 codec Base Classes"
  href="codec-base-classes.html"><img src='../icons/up.png'
  border='0' height='32'  alt='Up one Level' width='32' /></a></td>
<td class='online-navigation'><a rel="next" title="4.8.1.7 streamrecoder Objects"
  href="stream-recoder-objects.html"><img src='../icons/next.png'
  border='0' height='32'  alt='Next Page' width='32' /></a></td>
<td align="center" width="100%">Python Library Reference</td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
  href="contents.html"><img src='../icons/contents.png'
  border='0' height='32'  alt='Contents' width='32' /></a></td>
<td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png'
  border='0' height='32'  alt='Module Index' width='32' /></a></td>
<td class='online-navigation'><a rel="index" title="Index"
  href="genindex.html"><img src='../icons/index.png'
  border='0' height='32'  alt='Index' width='32' /></a></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="stream-reader-objects.html">4.8.1.5 StreamReader Objects</a>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" href="codec-base-classes.html">4.8.1 Codec Base Classes</a>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="stream-recoder-objects.html">4.8.1.7 StreamRecoder Objects</a>
</div>
<hr /></div>
</div>
<!--End of Navigation Panel-->

<h3><a name="SECTION006816000000000000000"></a><a name="stream-reader-writer"></a>
<br>
4.8.1.6 StreamReaderWriter Objects 
</h3>

<p>
The <tt class="class">StreamReaderWriter</tt> allows wrapping streams which work in
both read and write modes.

<p>
The design is such that one can use the factory functions returned by
the <tt class="function">lookup()</tt> function to construct the instance.

<p>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><span class="typelabel">class</span>&nbsp;<tt id='l2h-554' xml:id='l2h-554' class="class">StreamReaderWriter</tt></b>(</nobr></td>
  <td><var>stream, Reader, Writer, errors</var>)</td></tr></table></dt>
<dd>
  Creates a <tt class="class">StreamReaderWriter</tt> instance.
  <var>stream</var> must be a file-like object.
  <var>Reader</var> and <var>Writer</var> must be factory functions or classes
  providing the <tt class="class">StreamReader</tt> and <tt class="class">StreamWriter</tt> interface
  resp.
  Error handling is done in the same way as defined for the
  stream readers and writers.
</dl>

<p>
<tt class="class">StreamReaderWriter</tt> instances define the combined interfaces of
<tt class="class">StreamReader</tt> and <tt class="class">StreamWriter</tt> classes. They inherit
all other methods and attributes from the underlying stream.

<p>

<div class="navigation">
<div class='online-navigation'>
<p></p><hr />
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td class='online-navigation'><a rel="prev" title="4.8.1.5 streamreader Objects"
  href="stream-reader-objects.html"><img src='../icons/previous.png'
  border='0' height='32'  alt='Previous Page' width='32' /></a></td>
<td class='online-navigation'><a rel="parent" title="4.8.1 codec Base Classes"
  href="codec-base-classes.html"><img src='../icons/up.png'
  border='0' height='32'  alt='Up one Level' width='32' /></a></td>
<td class='online-navigation'><a rel="next" title="4.8.1.7 streamrecoder Objects"
  href="stream-recoder-objects.html"><img src='../icons/next.png'
  border='0' height='32'  alt='Next Page' width='32' /></a></td>
<td align="center" width="100%">Python Library Reference</td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
  href="contents.html"><img src='../icons/contents.png'
  border='0' height='32'  alt='Contents' width='32' /></a></td>
<td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png'
  border='0' height='32'  alt='Module Index' width='32' /></a></td>
<td class='online-navigation'><a rel="index" title="Index"
  href="genindex.html"><img src='../icons/index.png'
  border='0' height='32'  alt='Index' width='32' /></a></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="stream-reader-objects.html">4.8.1.5 StreamReader Objects</a>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" href="codec-base-classes.html">4.8.1 Codec Base Classes</a>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="stream-recoder-objects.html">4.8.1.7 StreamRecoder Objects</a>
</div>
</div>
<hr />
<span class="release-info">Release 2.5.1, documentation updated on 18th April, 2007.</span>
</div>
<!--End of Navigation Panel-->
<address>
See <i><a href="about.html">About this document...</a></i> for information on suggesting changes.
</address>
</body>
</html>
